The current study will assess the clinical Assessment of SpondyloArthritis international Society (ASAS) 20 response to Secukinumab and evaluate to which extent concomitant nonsteroidal anti-inflammatory drug (NSAID) treatment can be reduced between Week 4 and Week 12 in patients treated with Secukinumab 150 mg or placebo following an initial run-in phase of 4 weeks on stable NSAID therapy. Two different time points of NSAID tapering initiation will be evaluated in this study: